Abstract: Under the background of dual carbon strategic goal and rapid development of new energy, with the requirements of energy saving and emission reduction of traditional thermal power plants, combined with the advantages of the simple system and convenient layout of photovoltaic generation systems, the roof photovoltaic power generation system is installed on the roofs of the process system building, and is accessed to auxiliary power system. This paper analyzes the layout of various buildings and lighting conditions of thermal power plants, the characteristics of solar modules and string inverters, and proposes a feasible technical scheme for photovoltaic generation system on the roof of dry coal sheds. While making full use of the plant area of power plants, it reduces auxiliary power consumption, equivalently increases power generation and reduces coal consumption and flue gas emissions.